Methacrylic acid (2-Methyl-2-propenoic acid)

Tshuaj lom neeg

Methacrylic acid, abbreviated MAA, yog cov organic compound.Cov kua dej tsis muaj xim tsis muaj kuab paug no yog carboxylic acid nrog cov ntxhiab tsw ntxhiab tsw.Nws yog soluble hauv dej sov thiab miscible nrog feem ntau cov kuab tshuaj organic.Methacrylic acid yog tsim nyob rau hauv ib tug loj scale raws li ib tug precursor rau nws esters, tshwj xeeb tshaj yog methyl methacrylate (MMA) thiab poly (methyl methacrylate) (PMMA).Cov methacrylates muaj ntau yam siv, tshwj xeeb tshaj yog nyob rau hauv kev tsim cov polymers nrog cov npe lag luam xws li Lucite thiab Plexiglas.MAA tshwm sim hauv ib qho me me hauv cov roj ntawm Roman chamomile.

Daim ntawv thov

Methacrylic acid yog siv los tsim cov methacrylate resins thiab yas.Nws yog siv los ua Monomer rau loj-ntim resins thiab polymers, organic synthesis.Ntau ntawm cov polymers yog raws li esters ntawm cov kua qaub, xws li methyl, butyl, los yog isobutyl esters.Methacrylic acid thiab methacrylate esters yog siv los npaj ntau yam polymers [→ Polyacrylamides thiab Poly (Acrylic Acids), → Polymethacrylates].Poly (methyl methacrylate) yog thawj polymer nyob rau hauv pawg no, thiab nws muab cov dej ntshiab, tawv yas uas siv rau hauv daim ntawv hauv glazing, kos npe, qhia, thiab teeb pom kev zoo panels.

Lub cevfua orm

Ntshiabua kua

Hazard Class

8

Txee lub neej

Raws li peb cov kev paub dhau los, cov khoom tuaj yeem khaws cia rau 12 lub hlis txij li hnub xa khoom yog tias khaws cia rau hauv cov thawv kaw ntom ntom, tiv thaiv lub teeb thiab kub thiab khaws cia ntawm qhov kub ntawm 5 - 30 ° C.

Typical zog

Melting point

12-16 ° C (lit.)

Boiling point

163 ° C (lit.)

ceev

1.015 g / mL ntawm 25 ° C (lit.)

vapor ceev

> 3 (vs huab cua)

vapor siab

1 hli Hg (20 ° C)

Refractive Index

n20/D 1.431 (lit.)

Fp

170 ° F

cia temp.

Khaws ntawm + 15 ° C rau + 25 ° C.